高能量密度等离子体微晶化对Ni₃Al高温氧化的影响

来源期刊：中国有色金属学报1998年第2期

论文作者：王永刚 马铁军 何业东 朱日彰 郑修麟

文章页码：197 - 200

关键词：Ni₃Al 微晶 高温氧化 腐蚀

Key words：Ni₃Al micro-crystalline , high temperature oxidation , corrosion

摘    要：应用高能量密度等离子体对Ni₃Al进行微晶化处理，在合金表面获得了晶粒尺寸小于300 nm的微晶层。对比研究了Ni₃Al微晶处理前后在氧气中1000 ℃高温氧化的行为和规律。发现微晶化处理后的试样氧化膜晶粒被极大地细化，合金中Al选择氧化得到促进，氧化速率明显降低， 氧化动力学服从四次方规律x⁴=k_pt。

Abstract: High energy density plasma (HEDP) technique was applied to surface treatment of Ni₃Al. A micro-crystalline layer with grain sizes smaller than 300 nm was obtained. Isothermal oxidation at 1000 ℃ in oxygen for Ni₃Al before and after micro-crystallizing was studied. The results showed that for the micro-crystalline Ni₃Al, the grain of scale turns into very small, the selective oxidation of aluminium is promoted, the oxidation rate is decreased and the oxidation kinetics obeys the forth power equation: x⁴=k_pt.